FZUS53 KGRB 122135
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
434 PM CDT Sun Apr 12 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-130400-
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
434 PM CDT Sun Apr 12 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT MONDAY...

.LATE THIS AFTERNOON...S wind 15 to 25 kts. Waves 2 to 4 ft. A
chance of showers and thunderstorms.
.TONIGHT...SW wind 15 to 25 kts decreasing to 10 to 15 kts after
midnight. Waves 3 to 5 ft. A chance of showers and a slight
chance of thunderstorms in the evening. patchy dense fog.
.MONDAY...W wind 5 to 10 kts veering NE mid-day, then veering E
10 to 15 kts early in the afternoon. Waves 1 to 3 ft. Patchy
dense fog in the morning. .
.MONDAY NIGHT...E wind 10 to 15 kts backing N 5 to 10 kts after
midnight. Waves 2 ft or less. Rain and a chance of thunderstorms.
.TUESDAY...NW wind 5 to 10 kts backing S early in the afternoon.
Waves 2 ft or less. A chance of light rain.

$$

LMZ541-130400-
Rock Island Passage to Sturgeon Bay WI-
434 PM CDT Sun Apr 12 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.LATE THIS AFTERNOON...S wind 15 to 25 kts. Waves 6 to 10 ft.
Patchy dense fog. a chance of showers and thunderstorms.
.TONIGHT...SW wind 15 to 25 kts decreasing to 10 to 15 kts after
midnight. Waves 6 to 10 ft. A chance of showers and a slight
chance of thunderstorms in the evening. areas of dense fog.
.MONDAY...W wind 10 to 15 kts veering NE 5 to 10 kts mid-day,
then veering E 10 to 15 kts early in the afternoon. Waves 4 to
7 ft subsiding to 2 to 4 ft in the afternoon. Areas of dense fog
in the morning, then patchy dense fog in the afternoon. .
.MONDAY NIGHT...E wind 10 to 15 kts. Waves 2 to 4 ft. Rain and a
chance of thunderstorms.
.TUESDAY...W wind 5 to 10 kts backing SE early in the afternoon.
Waves 2 to 4 ft. A chance of light rain.

$$

LMZ542-543-130400-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
434 PM CDT Sun Apr 12 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING...

.LATE THIS AFTERNOON...S wind 15 to 25 kts. Waves 5 to 8 ft.
Patchy dense fog. a chance of showers and thunderstorms.
.TONIGHT...SW wind 15 to 25 kts. Waves 5 to 8 ft subsiding to
4 to 7 ft after midnight. A chance of showers and a slight chance
of thunderstorms in the evening. areas of dense fog.
.MONDAY...W wind 10 to 15 kts backing SE in the late morning and
afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft in the
afternoon. Areas of dense fog in the morning, then patchy dense
fog in the afternoon. a chance of light rain in the afternoon.
.MONDAY NIGHT...SE wind 10 to 15 kts veering SW after midnight.
Waves 2 to 4 ft. Rain and a chance of thunderstorms.
.TUESDAY...SW wind 10 to 15 kts backing S early in the afternoon.
Waves 2 to 4 ft. A chance of light rain in the afternoon.

$$

See Lake Michigan Open Lake Forecast for Wednesday through Friday.

Wave height forecast is for ice free areas.